The term 'Girl of Old Comics' refers to two characters from classic comic strips. The first is Betty Boop, a flapper-style cartoon character created in 1930 by Max Fleischer. She was known for her unique style and catchphrase, 'Boop-Oop-a-Doop'. The second is Etta Kett, a character from the comic strip 'Bringing Up Father', which ran from 1913 to 2000. Etta Kett was a young girl who often got into trouble with her father, Jiggs. Both characters were popular in their respective comic strips and remain beloved by fans today.